Thread-cutter.



G. GA'HAL.

THREAD CUTTER.

APPLICATlON FILED OCT. 1. 1915.

1,172,784. Patented Feb. 22,1916.

Fig.1. Fig.2. 15 ig. 3.

Ill. '2 21 -29 12 1 M1,. 2

E :15" I "7 i GEORGE GATIAL, OF TARENTUM, PENNSYLVANIA.

THREAD-CUTTER.

Specification of Letters Patent.

Patented Feb 22,1916.

Application filed October 1, 1915. Serial N0. 53,543

To all whom it may concern Be it known that I, GEORGE GATIAL, a sub ject of the King of Hungary, residing at Tarentum, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Thread-Cutters, of which the following is a specification.

This invention relates to certain new and useful improvements in thread cutting implements.

The primary object of the invention is the provision of a pipe threading attachment upon a construction of pliers, the thread cutters being readily adjustable as well as removable.

A further object of the device is the provision of a thread cutting implement in the form of a pair of pliers and having an adjustable thread cutting appliance operatively positioned upon the handles thereof and whereby threads may be readily out upon pipes without the necessity of employing a separate special instrument for that purpose, adjusting scales being arranged for the cutting dies.

1V ith these general objects in view and others that will appear as the nature of the invention is better understood, the same consists in the novel combination and arrangement of parts hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the appended claim.

In the drawings forming a part of this application and in which like-designating characters refer to corresponding parts throughout the several views: Figure 1 is an elevational view of the device. Fig. 2 is a side view thereof. Figs. 3, 4 and 5 are enlarged sectional views taken respectively upon lines IIIIII, IVIV and VV of Fig. 1, and Fig. 6 is a perspective view of one of the thread cutting dies detached.

Referring more in detail to the drawings, a pair of pliers is provided having pipe engaging jaws 11 with serrated difierent-sized openings 12 and 13 in the form of pipe tongs, the usual operating handles 14 be ing arranged pivotally connected together as- The present invention has particular reference to a thread cutter carried by the plier handles 14, the same consisting of four cutting dies 26 having curved thread cutting teeth 27 upon their inner edges, the said dies having parallel side slots 28 whereby the dies are slidably mounted within outwardly extending slots 29 of the handles 14 which slots open at opposite curved portions 30 thereof adjacent the handle pivot 15. Arcuate side plates 31 are carried by the handles 14 marginally of the curved surfaces 30 thereof and overlying the slots 29 being secured to the handles by means of screws 32. The plates 31 are provided with set screws 33 movable within the path of movement of the dies 26 and adapted to be seated within the desired one of the side sockets 34 of the said dies when the latter are in their adjusted positions. Graduation markings 35 are arranged upon the handles 14 at the outer sides of the slots 29 being so arranged that the dies 26 may be all positioned uniformly and then retained by means of the set screws 33.

The complete operation of the device will be apparent from this detailed description thereof. With the dies 26 accurately set in their adjusted positions and the teeth 27 positioned over the pipe by separating the handles 14, the dies are readily closed down upon the work by forcibly drawing the handles 14 together in which position the device may be bodily revolved upon the pipe for cutting threads therein to desired depth. It will be readily understood that for pipes of different diameters the thread cutter may be arranged for operation thereon by readily shifting the cutting dies 26 upon loosening the set screws 33, while the degree of separation of the handles also assists in allowing the cutters to accommodate themselves to operative positions upon the pipe. The operation of the remainder of the device will be apparent without further explanation.

While the form of the invention herein shown and described is what is believed to be the preferred embodiment thereof, it is nevertheless to be understood that minor changes may be made therein without departing from the spirit and scope of the invention as claimed.

What I claim as new is An implementincluding pivotal supporting members, opposed curved surfaces formed in said members, said members having recesses formed therein opening into the curved surfaces, cutting dies positioned in said recesses, interlocking tongues and grooves between the dies and side Walls of the recesses, arcuate plates positioned at the opposite sides of the curved surfaces, means for securing the same to the members, and means carried by the arcuate plates adapted to engage said dies to retain the same in 10 adjusted position.

In testimony WhereofI afiiX my signature.

GEORGE GATIAL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,- Washington, D. G. 

